Model comparison
Gemini 2.0 Pro vs GPT-5.3 Codex
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 39.1 on the Noometry Index.
Last verified . 1 shared benchmarks.
GoogleSummary
- They share 1 benchmark with published results for both. Gemini 2.0 Pro scores higher in 0 categories and GPT-5.3 Codex in 1 category; one gap is clear of the uncertainty.
- The widest gap is in coding, where GPT-5.3 Codex leads 48.6 to 37.8.
Side by side
| Gemini 2.0 Pro | GPT-5.3 Codex | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 39.1 | 45.8 |
| Released | 2025-02-05 | 2026-02-05 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.75 |
| Output $ / M tokens | — | $14 |
| Results tracked | 14 | 8 |
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Category by category
Coding GPT-5.3 Codex leads
Gemini 2.0 Pro: 37.8 (#187), GPT-5.3 Codex: 48.6 (#56)
| Benchmark | Gemini 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| SWE-bench Verified | — | 74.8% |
| Aider Polyglot | 35.6% | — |
| LMArena WebDev | — | 1409 |
| WeirdML | — | 79.3% |
| LiveBench Coding | 63.5% | — |
| ALE-Bench | — | 1,655 |
Agentic & Tool Use Not comparable
Gemini 2.0 Pro: —, GPT-5.3 Codex: 48.0 (#9)
| Benchmark | Gemini 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| Terminal-Bench | — | 78.4% |
| METR Time Horizons | — | 74.5% |
| Vending-Bench 2 | — | 5,940 |
Reasoning Not comparable
Gemini 2.0 Pro: 22.3 (#198), GPT-5.3 Codex: —
| Benchmark | Gemini 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| Epoch Capabilities Index | 135.06 | 156.77 |
| EnigmaEval | 0.7% | — |
| LiveBench Reasoning | 60.1% | — |
| LiveBench Data Analysis | 68% | — |
| LiveBench | 65.1% | — |
Math Not comparable
Gemini 2.0 Pro: 39.7 (#100), GPT-5.3 Codex: —
| Benchmark | Gemini 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LiveBench Math | 71% | — |
| MATH Level 5 | 83.5% | — |
Knowledge Not comparable
Gemini 2.0 Pro: 36.5 (#167), GPT-5.3 Codex: —
| Benchmark | Gemini 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| GPQA Diamond | 65.7% | — |
| Confabulations | 18.4% | — |
Instruction Following Not comparable
Gemini 2.0 Pro: 75.5 (#59), GPT-5.3 Codex: —
| Benchmark | Gemini 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LiveBench Instruction Following | 83.4% | — |
Long Context Not comparable
Gemini 2.0 Pro: 29.2 (#292), GPT-5.3 Codex: —
| Benchmark | Gemini 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| Fiction.LiveBench | 41.7% | — |
Writing & Preference Not comparable
Gemini 2.0 Pro: 52.7 (#165), GPT-5.3 Codex: —
| Benchmark | Gemini 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LiveBench Language | 44.9% | — |
Frequently asked questions
Is Gemini 2.0 Pro better than GPT-5.3 Codex?
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 39.1 on the Noometry Index.
Is Gemini 2.0 Pro or GPT-5.3 Codex better for coding?
GPT-5.3 Codex scores higher on coding benchmarks: 48.6 versus 37.8 in the Noometry coding category.
How many benchmarks do Gemini 2.0 Pro and GPT-5.3 Codex share?
1 benchmark has published results for both models. Gemini 2.0 Pro has 14 scored results on Noometry and GPT-5.3 Codex has 8.